Sir My Mother Is 69 Years Old And Weighing About

Sir My mother is 69 years old and weighing about 46 kgs. She is diagnosed with cervical lymphodantis after FNAC test. She has been adviced to take FORECOX 2 tabs in the morning empty stomach from last 2 months. How long she needs to continue the dose since my doctor suggested to take for 6 months. Actually at present there is no lymp swelling under the chin.